Anatomy and Physiology Week 4

This week we seemed to me to be in a bunch of different places. We discussed the superior and inferior sagittal sinuses, the tentorium cerebelli, the falx cerebelli, which seperates the two hemispheres(right and left), the cerebellum, which is where motor activity is coordinated and multiple muscle contraction, and the falx cerebellum, which seperates the cerebellum hemispheres and we discussed how all skeletal muscle contractions originate from the precentral gyrus. We discussed most all of these while looking at a slide of the human brain so its kind of hard to describe in a blog. One of the main things we discussed both this week and last was the venous blood flow of the head and neck. It goes on one side from the superior sagittal sinus, to the right tranverse sinus, to the right sigmoid sinus, to the right internal jugular, then to the right brachiocephalic then to through the superior vena cava. The opposide side goes through the inferior sagittal sinus, the straight sinus, the left transverse sinus, the left sigmoid sinus, the left internal jugular, the left brachiocephalic, and then the superior vena cava. The right external jugular goes into the right subclavian and then to the right brachiocephalic and the superior vena cava. The left external jugular does just the opposite, going through the left subclavian, the left brachiocephalic, and then to the superior vena cava.